package com.fortest;

public class Test3 {
    public static void main(String[] args){
//        String test="[\"1\",\"2\"]";
//        test=test.replace("\"","");
//        System.out.println(test);
//        System.out.println("你好");
        System.out.println("hello,worldhello".indexOf("hello"));
        System.out.println("hello,world".indexOf("aa"));
    }
}
